Since you haven't used PC in so long, I'd start by replacing the motherboard battery. It's a CR2032 3-volt coin cell battery.
Did you re-connect all the motherboard cables after replacing the CPU, especially these (and all the others)?
12 V power connector (ATX_12V)
Main power connector (ATX1)
Front panel connector (F_PANEL)
Exactly which i7 CPU did you install? This motherboard has the Intel X58 chipset and only supports the i7 CPUs listed here. But even if the CPU is listed there, that doesn't necessarily mean Dell BIOS supports that specific CPU.
The last version of BIOS is A04, and it added support for (unspecified) new CPUs, but you'd have to reinstall the original CPU and get the PC to boot from a bootable USB stick to upgrade to the latest version. Then swap in the new i7 to see if it's supported. And don't forget new thermal paste every time you swap in a different CPU.
What RAM did you install? This PC supports 1333‑MHz DDR3 DIMM; non‑ECC memory.
It will be hard for you to figure out which BIOS you have since you can not power on the pc. for testing purpose you can get a i7-920 (C0 stepping) SLBCH that is supported by any version of bios of X58 chipset. It is dirt cheap. If BIOS is not updated, PC may not support some of the later 1st gen i7 cpu including the 6 core ones.
If CMOS jumper on motherboard is reset, but still can not turn on pc at all, may need to test with a different working psu. any psu with 24/8 pin will do.
RoHe
10 Elder
•
45.2K Posts
0
December 7th, 2020 15:00
Since you haven't used PC in so long, I'd start by replacing the motherboard battery. It's a CR2032 3-volt coin cell battery.
Did you re-connect all the motherboard cables after replacing the CPU, especially these (and all the others)?
Exactly which i7 CPU did you install? This motherboard has the Intel X58 chipset and only supports the i7 CPUs listed here. But even if the CPU is listed there, that doesn't necessarily mean Dell BIOS supports that specific CPU.
The last version of BIOS is A04, and it added support for (unspecified) new CPUs, but you'd have to reinstall the original CPU and get the PC to boot from a bootable USB stick to upgrade to the latest version. Then swap in the new i7 to see if it's supported. And don't forget new thermal paste every time you swap in a different CPU.
What RAM did you install? This PC supports 1333‑MHz DDR3 DIMM; non‑ECC memory.
redxps630
9 Legend
•
15.4K Posts
0
December 7th, 2020 18:00
It will be hard for you to figure out which BIOS you have since you can not power on the pc. for testing purpose you can get a i7-920 (C0 stepping) SLBCH that is supported by any version of bios of X58 chipset. It is dirt cheap. If BIOS is not updated, PC may not support some of the later 1st gen i7 cpu including the 6 core ones.
If CMOS jumper on motherboard is reset, but still can not turn on pc at all, may need to test with a different working psu. any psu with 24/8 pin will do.